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  1. #1 Re: Built 4t65e - No short cuts 
    GXP Level Member Turbocharged400sbc's Avatar
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    let me guess your drain threads pulled clean out....

    ive already fixed two with 1/2-20 heilicoils though I shoulda probably gone with the more expensive m12 to use the GM engine oil pan drain plug with the captured Oring gasket....would work great with the nice flat boss of the zzp pan.

    both of the ones ive seen had some crappy machining of the pan rails....
    ~James~ Psychotic Gearhead
    projects: 84 Cressida waGN~ 90 LN3 3800, equal length headers, T70, 89 700r4, misc parts,
    1994 Oldsmobile 442 (462ci-4wd-2 engines) L67/4t80e^2,
    00 Turbo Regal 608 fwhp 575ftlbs at 5500rpm, 98 WhippledRiv, 97 GTP
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  2. #2 Re: Built 4t65e - No short cuts 
    Solving problems BrandonHall10's Avatar
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    Quote Originally Posted by Turbocharged400sbc View Post
    let me guess your drain threads pulled clean out....
    Well, they're not completely gone. But useless, nonetheless.



    Quote Originally Posted by Turbocharged400sbc View Post
    ive already fixed two with 1/2-20 heilicoils though I shoulda probably gone with the more expensive m12 to use the GM engine oil pan drain plug with the captured Oring gasket....would work great with the nice flat boss of the zzp pan.
    I have no idea what the original thread was. I bought it used knowing the threads were hosed. Previously, it had an M14x1.5 "oversize" plug. I'm hoping there's enough material left in the hole for a standard M14x1.5 HeliCoil. My local hardware actually has generic drain plugs in stock, and a pretty good assortment of sealing washers. The plug I got was the perfect size for one of the Neo magnets I have floating around the garage.



    Quote Originally Posted by Turbocharged400sbc View Post
    both of the ones ive seen had some crappy machining of the pan rails....
    There was some pretty bad machining chatter. Bad enough that I hit it with some emery cloth. Should be good now.
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  3. #3 Re: Built 4t65e - No short cuts 
    GrandPrix Junkie idrivejunk's Avatar
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    Maybe should have skipped the helicoil altogether.
    All Grand Prix, all the time. 69 Model J, 99 GT & GTP coupes. All junk, haha.
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  4. #4 Re: Built 4t65e - No short cuts 
    Solving problems BrandonHall10's Avatar
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    Quote Originally Posted by idrivejunk View Post
    Maybe should have skipped the helicoil altogether.
    We'll get it sealed up one way or another. I'm not worried.
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